Found this for you:
Breeding Red-Nose Tetra is still a real challenge; their eggs are prone to fungal infections and the tiny fry requires fine live food such as infusoria and freshly hatched brine shrimp larvae for a long period of time. Water of the breeding tank must be very soft (GH 1-3 d) with pH lower than 6.0. Peat filtering is recommended. The breeding tank should be darkened to prevent fungal infections. Eggs hatch in about 36 hours at a temperature of 26 C and the fry begins to swim in about five days. Because the young fish are very sensitive water quality must be constantly monitored. After a month or so you can start gradually increasing water hardness.
© Bilyap Aquaristic
Hemigrammus rhodostomus
Overview:
A pretty and very peaceful tetra that spends its time actively schooling with others of the same species. Fits into almost any community tank, so long as the water conditions are high quality and some hiding places (at least either plastic or live plants).
Quick stats:
size: 2 inches
tank: 30 inches
strata: middle
pH: 6.0 to 7.5
Hardness: Soft to neutral
temperature: 74ºF to 82ºF (23-29°C)
Classification:
Order: Cypriniformes
Suborder: Characoidei
Family: Characidae
Genera: Hemigrammus
Common name:
Rummy-nose tetra
Distribution:
Lower Amazon region, around Aripiranga and Paraguay.
General Body Form:
Torpedo shaped, elongate body.
Coloration:
This is a distinctive looking little tetra with black and white "checkerboard" markings on its tail and a bright red nose, for which it is named. The red nose is actually the best indication of the fish's health and well-being--when it is feeling ill at ease or not in tiptop shape (for example, when first introduced to the tank), this red will fade to a dull pink, barely distinguishable from its unremarkable gray body color.
Maintenance:
The rummy-nose tetra is an excellent fish for the community tank once it is adjusted to its surroundings, but this initial adaptive phase can be a bit longer than for some fish. In the meantime, it tends to be sensitive to water quality, so test this frequently. It does not take well to addition of salt and many chemical additives, and pH fluctuations can kill it. It must be kept with at least 3 members of its own species, or else it will sulk in the corner and show signs of stress. Healthy species will adapt eventually to a well-planted tank and school actively in and out of every corner of the aquarium, their noses glowing brightly.
Biotope:
A planted South American Riverbank setup.
Breeding:
This is a delicate fish and is very hard to breed. Provide a large tank with lots of plants and very soft water. Several pairs should be placed together. After a long period of acclimation and conditioning they may spawn. A small number of eggs are produced which will hatch in about thirty hours.
Good luck, HTH